# 函数测试

def fun_test():
    """test """
    print("1")
    print("2")
    print("3")


def sum_num(sum1, sum2):
    """ 对两个数字的求和"""
    result = sum1 + sum2
    print("%d+%d=%d" % (sum1, sum2, result))
    return result


# sum_num(10,3000)


def sum_num1(sum1, sum2):
    """ 对两个数字的求和"""
    result = sum1 + sum2
    return result


resilt = sum_num1(10, 3000)
print('输出结果为%d' % resilt)


def print_a():
    print('a' * 50)


def print_b():
    print('b' * 50)
    print_a()  # 嵌套a函数
    print('c' * 50)


print_b()
